A tensile-testing apparatus is to be constructed that must withstand a maximum load of XXXXXXXXXXN. The design calls for two cylindrical support posts, each of which is to support half of the maximum...

A tensile-testing apparatus is to be constructed that must withstand a maximum load of 246004 N. The design calls for two cylindrical support posts, each of which is to support half of the maximum load. Furthermore, plain-carbon(1045) steel ground and polished shafting rounds are to be used; the minimum yield and tensile strengths of this alloy are 395 MPa and 565 MPa(82,000 psi), respectively. Specify a suitable diameter in mm for these support posts. Assume safety level is 2.2. Round your answer to 2 significant figures.